Ive had a lot of weird problems with my ls turbo now. Before i put the oil catch can on i was having a lot of blowby out the valvecover so it was sprayin everywhere. I recently put an oil catch can on with a breather filter on top. Now I cant even go WOT without the oil seal blowing off and causing it to leak out the seal onto the side of the block where the timing belt is.
My pcv setup is running from the black box on the back of the block to the catch can and the side of the valve cover to the can. I have a obd1 block with an obdII head so i still have the pcv from the intake manifold to the valve cover.
My piston ring is gone on the last cylinder. Checked the compression was not to good it was 180, 160, 160, 100 psi on an ls with over 100k.
Gettin ready to build the block with low compression pistons and rods. But in the mean time can some1 give me some suggestions on what i should do with all the pressure built up in the crankcase. And also if my pcv setup with catchcan is correct? What is causing my oil seal to always blow off the cam under the cam cap? Is it my pcv setup or is it because my piston rings? PLEASE HELP

 

Your root cause of your problem is the rings. Rebuild it with new rings and do a leak down. If it comes out good you should be fine.

 

Are you still running the pcv check valve?

 

well i plan on gettin low compression pistons and rods and replacing all the gaskets and seals. The oil seals didnt blow out till after i installed the oil catch can. Like i said i got one line runnin from the back of the block to the catch can and one from the valve cover to the catch can. Then i have a pcv off the valve cover to the intake mani. what would cause the oil seal to blow out like that bc it didnt start happening till after catch can or is it just because my rings have gotten so bad?

 

some1 help

 

the engine cannot breathe enough through the pcv alone. you will need to make sure that the catch can is also vented because if your crankcase is that pressurized, you will always blow out seals

 

yeah well i have a breather filter on the catch can

 

you type like an 8 yearold who dropped out of school

what oil seal is blowing off?

if you use a PCV valve take it out and run a hose directly from the black box to the vented catch can

run a hose from the VC nipple to the vented catch can.

done

it will have MASSIVE amounts of blow by until you get your compression fixed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bseries_beast &raquo;</TD></TR><TR><TD CLASS="quote">Now I cant even go WOT without the oil seal blowing off and causing it to leak out the seal onto the side of the block where the timing belt is.
I have a obd1 block with an obdII head so i still have the pcv from the intake manifold to the valve cover.
</TD></TR></TABLE>

sounds like the problem right there.. if you have the PVC hooked to the intake manifold. the intake manifold is filled with the Boost pressure and that feeds into the PCV so you have boosted air going into your crankcase. plus the crankcase pressure alone. doesnt sound like you have the check valve in there to prevent the excess boost pressure from the intake manifold entering the PCV system.